Alan E.
Google
You would be signing your own death warrant swimming here. This famous river starts with the confluence of 2 massive rivers - The Ucayali and The Marañón. With a mind boggling 60m in dept at this point of the Amazon, you can see multiple whirlpools swirling around. It was always a dream of mine to see this river, and from the safety of my small but strong wooden motorboat, it proved to be a very cathartic experience just cruising on this colossal volume of mud coloured water. Many things here, left me open-mouthed such as regular fluvial erosion by seeing and hearing huge sections of steep bank just cave into the river spontaneously. Also the wildlife is a million miles away to what I'm used to - caimans, anacondas, multiple species of birds of prey, and both grey & pink river dolphins. Yes, pink river dolphins! They are endangered but you can see them every few minutes here, playfully swimming around your boat. Also, fishing for piranha is something that I never thought I would ever do, and here it's perfectly normal. Overall, an experience I will never forget!